Grate for stoves or furnaces.



I PATENTED JAN. 27,1903. J. H. GOODFELLOW & J. W. PIPER-.

GRATE .FOR STOVES OR FURNACES.

APPLICATION FILED APR. 12, 1902. I

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No. 718,998. I PATENTED JAN. 27,' 1903. J. H. GOODFELLOW & J. W. PIPER.

GRATE FOB. STOVES OR FURNACES. APPLICATION FILED APR. 12, 1902.

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JOHN H. GOODFELLOW, OF BUFFALO, NEW YORK, AND JOSEPH W. PIPER, OF LOWELL, MASSACHUSETTS; SAID GOODFELLOW ASSIGNOR TO SAID PIPER.

GRATE FOR STOVES OR FURNACES.

SEEGIFICATION formingpart of Letters Patent No. 718,998, dated January 27, 1903.

Application filed April 12, 1902. Serial No. 102,816. (No model.)

T MZ whom, it may concern: fire-chamber. The bars of the upper set are Beit knownthatwe,JOHNH.GODFELLOW, pivoted on the top of the grate-ring, while residing in Buffalo, in the county of Erie and the bars of the lower set turn on pivots on the State of New York, and JOSEPH XV. PIPER, under side of the ring, or to save weight and 5 residing in Lowell, in the county of Middlethickness upon studs which project from the sex and Commonwealth of Massachusetts, bottom of a flange which extends downward citizens of the United States, have invented a from said grate-ring. The grate-ring is arcertain new and useful Improvementin Grates ranged in an annular housing resembling that for Stoves or Furnaces, of which the followshown in said patent and provided with open- 1o ing is a specification. ings in its inner wall, through which the fin- This invention relates to grates for stoves gers projectinto the fire-chamber. The openand furnaces, and is an improvement on the ings through the inner wall of the housing for grates shown, described, and claimed in the same set of grate-bars are arranged at equal United States Letters Patent No. 629,719, angular intervals in the same plane; but the I5 granted July25, 1899, to us. In said patented openings for one set of bars are so arranged device two grates are used,onearranged above with reference to the other set that when the the other, the fuel normally resting on the bars of one set have their greatest projection lower grate and each of the grates consisting from the housing the bars of the other set of a ring or annular frame, to which are pivhave their least projection, and so that turn- 2o oted at their outer cnds curved tapering fining the grate-ring in either direction moves gers or grate-bars which project through openthe points of one set of bars outward or away ings in housings, so that by moving either from the center of the fire-chamber and siring the corresponding gratebars will be inultaneously moves the points of the other either forced into or withdrawn from the fireset inward. This improvement enables the 25 chamber or combustion-chamber. Said patoperation of removing the ashes and clinkers ent discloses means by which such grates can to be performed in about half the time rebe operated successfully to extend the upper quired by the use of said patented invention, grate-bars into the fire-chamber to support and the former may be substituted for the the main body of the fuel and then to withlatter, except where the grate-surface is so 3o draw the lower grate-bars to allow the ashes large as to require considerable muscular and clinkers below the upper grate to fall strength to move the grate singly. from the fire-chamber, after which the lower In the accompanying drawings, Figure 1 is grate-bars are first restored tonormal posia front elevation of the lower part of a firetion, and then the upper grate-bars are withpot, grate-ring, housing, and base of a stove 35 drawn to allow the mass of fuel to fall upon or furnace, showing a part of the outer casthe lower grate-bars. WVe have found that ing in central vertical section; Fig. 2, a cenequally good results may be obtained by movtral vertical section of the gratering and ing both sets of grate-bars simultaneously in housing on the line 2 2 in Fig. 3; Fig. 3, a opposite directions, effecting a gain in the horizontal section of the housing on the line 40 time required and dispensing with a number 3 3 in Fig. 2. Figs. 2 and 3 also show the upper of the parts necessaryin the patented device. grate-bars or fingers, said bars being partly In carrying out our present invention we in vertical section and in operative position use a single grate-ring to operate both sets in Fig.2 and in plan and in the same position in of grate-bars, and we curve the grate-bars of Fig. 3. Figs. 4 and 5 represent enlarged ver- 45 one set in the opposite direction from the curtical sections of the housing on the lines 4. 4. vature of the bars of the other set, or, in other and 5 5, respectively, in Fig. 3; Fig. 6, a plan words, in the matter of curvature only the of the grate-ring, the dotted circles showing bars of one set are inverted with respect to the lower pivots; Fig. 7, an elevation of the those of the other set, the concave side of any grate-ring; Fig. 8, a horizontal section on the 10c 50 bar when the same is withdrawn being the line 8 8 in Fig. 2.

inner side or side toward the center of the The case A, base B, and fire-pot or main combustion-chamber C may be of any usual construction and as shown in said patent, said fire-pot being represented as supported upon a housing D, which forms a downward extension of the combustion-chamber. The base will contain the usual ash-pit below the housing and the usual doors for draft and removal of ashes, these parts not being shown, as they are well understood. The housing D is of somewhat different construction from that shown in said patent, but serves a similar purpose and is of substantially the same shape externally. In the present invention the housing D is made in two (instead of three) separable annular concentric sections d d, the upper 61 of which rests upon the lower section 01, the latter resting upon the base 13 within the concentric annular flange Z). The top of the upper housing-section cl may be provided with aconcentric annular flange d to receive and fit the lower end of the fire-pot O. The housing-sections are held from lateral movement with respect to each other by the meeting edges of their outer walls being lap-jointed at (P. The housing-sections may be secured to each other by bolts, as shown in said previous patcut; but this is not considered necessary, as the weight of said sections and of the firepot, aided by the flanges b d and the lapjoint (i will keep them in place. The inner walls of the upper housing '61 are provided with openings or ports d, which for convenience of casting are continued upward through the surface cl, on which the fire-pot O rests, and other ports or openings (1 are formed in the top of the inner wall of the lower housing-section d, the upper ends of which are closed by downward projections 01 on the lower edge of the inner wall of the section d, these last-named openings 61 being substantially as shown in said patent. Instead of the two separate grate-rings shown in said patent we have herein shown a single grate-ring E, which serves as an operatingring for two separate series of grate-bars or fingers e a The grate-ring E is arranged in the housing D and is provided with a radial projection or handle 6 which projects through a slot at", by means of which said ring E may be turned. Studs a project from the top of the ring E and serve as pivots for the upper grate-bars c and similar studs 6, on

which are pivoted the lower grate-bars 6 project downward from a flange e on the bottom of said ring. The upper grate-bars project through the ports (1 and the lower grate-bars through the lower ports (1 into the combustion-chamber or central space of the housing. The ports (1 d are of such width that the abutments or sides of said ports cause the corresponding grate-bars e e to swing outward or inward as the ring E is turned, and the pivots of said bars and said ports are so arranged that one series of bars are thrown inward toward the center of combustionchamber simultaneously with the outward movement of the bars of the other series. The grate-bars of the upper and lower series are oppositely curved, but in other respects may be substantially alike and as shown in said patent and are retained on their respective pivots by the inner surfaces of the top and bottom of the housing and are partially supportedby the lower edges of their respective ports. The housing is preferably provided with channels d (1 to reduce friction of the moving partsthat is, of the ring E and grate-bars--on said housing, and is also provided with vertical perforations (Z 01 which allow the escape of ashes and prevent the clogging of said grate-ring and grate-bars by the accumulation of ashes in the housing, said perforations also admitting air to the outer parts of the fuel and serving the purpose of a gas-ring shown and described in said patent.

We claim as our invention- The combination of a grate-ring, two series of oppositely-curved grate-bars, one series pivoted to the top and the other to the bottom of said ring, and a suitable housing for said ring having ports or openings in its innor wall through which said bars project, said ports or openings being arranged to cause the bars of either series to swing inward toward the center of said housing when the bars of the other series swing outward.

In testimony whereof we have affixed our signatures in presence of two witnesses.

JOHN H. GOODFELLOW. JOSEPH W. PIPER.

\Vitnesses:

ALBERT M. MOORE, PETER A. FAY. 

